replace coolant on 2015 ML350
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2015 Mercedes-Benz ML 350
replace coolant on 2015 ML350
Hi,
I am looking for instruction to replace my coolant on my 2015 ML 350, I did see few you tube talked about drain the coolant, and then close the drain plug, and then use one gallon distilled water to fill up again, turn on engine with heat turn on mx if it is in winter, and 15 minutes, let engine cool, and then drain it again, repeated twice with another gallon distilled water. but my question is there must be has some distilled water left in the system, when I fill with original MB Coolant, would that be ok?
Thanks
Frank
I am looking for instruction to replace my coolant on my 2015 ML 350, I did see few you tube talked about drain the coolant, and then close the drain plug, and then use one gallon distilled water to fill up again, turn on engine with heat turn on mx if it is in winter, and 15 minutes, let engine cool, and then drain it again, repeated twice with another gallon distilled water. but my question is there must be has some distilled water left in the system, when I fill with original MB Coolant, would that be ok?
Thanks
Frank
Thread Starter
Junior Member
Joined: Oct 2017
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2015 Mercedes-Benz ML 350
dealer told me to use this: Mb 325.6 G40 Anti-Freeze 1 Gallon 1 Gal - Mercedes-Benz (000-989-68-07-09-0109)
(0009896807090109)
i have never replace my coolant on my 2015 ML350, it has 45K miles on it. my original coolant is pink color.
Thanks
Frank
(0009896807090109)
i have never replace my coolant on my 2015 ML350, it has 45K miles on it. my original coolant is pink color.
Thanks
Frank
Out Of Control!!
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From: unbegrenzt
2017 GLE350 4MATIC
Hi,
I am looking for instruction to replace my coolant on my 2015 ML 350, I did see few you tube talked about drain the coolant, and then close the drain plug, and then use one gallon distilled water to fill up again, turn on engine with heat turn on mx if it is in winter, and 15 minutes, let engine cool, and then drain it again, repeated twice with another gallon distilled water. but my question is there must be has some distilled water left in the system, when I fill with original MB Coolant, would that be ok?
Thanks
Frank
I am looking for instruction to replace my coolant on my 2015 ML 350, I did see few you tube talked about drain the coolant, and then close the drain plug, and then use one gallon distilled water to fill up again, turn on engine with heat turn on mx if it is in winter, and 15 minutes, let engine cool, and then drain it again, repeated twice with another gallon distilled water. but my question is there must be has some distilled water left in the system, when I fill with original MB Coolant, would that be ok?
Thanks
Frank
Drain.
Refill.
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2013 ML550 US spec. Air+Offroad pkg
If you do the distilled water flush procedure, you need to use undiluted coolant and distilled water. Determine the system capacity, divide by 2 to determine 1/2 capacity, then put that much undiluted coolant in, then top it off with distilled water. Make sure to check level several times after drive cycles and top off with distilled water as system burps air bubbles out.
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Thread Starter
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2015 Mercedes-Benz ML 350
the question once you use distilled water , then how you sure how much water is in the system? I did see people use coolant measurement tool to measure the % of coolant and water. May be I just drain and fill once. so I dont need worry about?
Thanks
Frank
Thanks
Frank
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2013 ML550 US spec. Air+Offroad pkg
Doesnt matter if you follow above procedure with undiluted coolant (full strength) If system takes 9 liters, for instance, you know that 4.5L is coolant and rest is water. Make sense?
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2013 ML550 US spec. Air+Offroad pkg
No, you can't do that, because there is always a little left in there. You must look up the coolant system specs (can prob google it) and use that for your refill quantities. You may drain out 8.5 Liters, but system actually holds 9.5 for instance, so you wouldn't have correct ratio then, because you would be starting with 1 Liter of water (too diluted). Just look up the capacity, put 1/2 of that capacity back in first with pure coolant (NOT pre-diluted), then top it off with distilled water. Remember to start with the coolant and top off with water, otherwise you will have too much water in there, and system will be too diluted.
I'd also NOT just use 1 gal of water to flush, I'd fill it up and do it that way, otherwise there won't be enough liquid in there to properly circulate, or to properly dilute what is still in system. You will need to ensure you have heater turned on to get it thru the heater core, and give it a little time to heat up so thermostat opens up to fully circulate the water thru the coolant system.
I'd also NOT just use 1 gal of water to flush, I'd fill it up and do it that way, otherwise there won't be enough liquid in there to properly circulate, or to properly dilute what is still in system. You will need to ensure you have heater turned on to get it thru the heater core, and give it a little time to heat up so thermostat opens up to fully circulate the water thru the coolant system.
Last edited by Leetom; Dec 3, 2022 at 03:26 PM.
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13 GL350, 14 SL550
Easiest way to refill properly is this.
Buy 2 jugs of coolant.
Pour one in. That means you have approx 4 liters / 1 gallon of coolant in the system.
Use that empty jug and fill it with water. Don't fill right to the top, fill it to the same level it was filled with coolant originally (ie. 1" down from the top)
Pour that water in.
You now have 8 liters (2 gallons) of guaranteed 50/50 mix in the cooling system.
Start engine, run it for a bit, leave it overnight to cool completely.
Take second jug and pour half of it into empty jug. Top off half jug of coolant with water so you have a 50/50 jug. Label it "50/50 coolant"
Pour as much of this 50/50 as you need till the 'full cold' marking is reached. Keep the rest of the jug for top offs later as required.
Have been doing this for 20+ years and it works. The only coolant going into your system is guaranteed to be 50/50 and you can't mess it up. Plus you have premixed coolant for later use if needed too!
Buy 2 jugs of coolant.
Pour one in. That means you have approx 4 liters / 1 gallon of coolant in the system.
Use that empty jug and fill it with water. Don't fill right to the top, fill it to the same level it was filled with coolant originally (ie. 1" down from the top)
Pour that water in.
You now have 8 liters (2 gallons) of guaranteed 50/50 mix in the cooling system.
Start engine, run it for a bit, leave it overnight to cool completely.
Take second jug and pour half of it into empty jug. Top off half jug of coolant with water so you have a 50/50 jug. Label it "50/50 coolant"
Pour as much of this 50/50 as you need till the 'full cold' marking is reached. Keep the rest of the jug for top offs later as required.
Have been doing this for 20+ years and it works. The only coolant going into your system is guaranteed to be 50/50 and you can't mess it up. Plus you have premixed coolant for later use if needed too!
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2013 ML550 US spec. Air+Offroad pkg
bha...That wont work in this case since he will be flushing system with water first. There will be an unknown quantity of pure water left in the system after flush/drain, so only way to guarantee proper 50/50 mix is to put 1/2 of the coolant system spec qty in first, and top off with water.
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13 GL350, 14 SL550
bha...That wont work in this case since he will be flushing system with water first. There will be an unknown quantity of pure water left in the system after flush/drain, so only way to guarantee proper 50/50 mix is to put 1/2 of the coolant system spec qty in first, and top off with water.
Draining works well as it gets 90% of the coolant out anyhow. If you get 8 liters out and replace them, the 9th liter in the engine block doesn’t really affect anything. I know most engines have block drains, but it isnt’ worth the trouble to remove just 1 liter. I have never done it.
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From: In the Shadow of the Tetons
2013 ML350 Bluetec
Good god why is this being overanalyzed? There's no need to flush.
Drain. What comes out comes out.
Fill with 50/50 mix until it is full. Burp it. Fill it some more. Burp/repeat as needed.
Done.
If you don't feel like you've "gotten it all", it really doesn't matter. Just like a transmission dump/fill. Do it twice if you're that concerned.
Drain. What comes out comes out.
Fill with 50/50 mix until it is full. Burp it. Fill it some more. Burp/repeat as needed.
Done.
If you don't feel like you've "gotten it all", it really doesn't matter. Just like a transmission dump/fill. Do it twice if you're that concerned.
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From: unbegrenzt
2017 GLE350 4MATIC
Good god why is this being overanalyzed? There's no need to flush.
Drain. What comes out comes out.
Fill with 50/50 mix until it is full. Burp it. Fill it some more. Burp/repeat as needed.
Done.
If you don't feel like you've "gotten it all", it really doesn't matter. Just like a transmission dump/fill. Do it twice if you're that concerned.
Drain. What comes out comes out.
Fill with 50/50 mix until it is full. Burp it. Fill it some more. Burp/repeat as needed.
Done.
If you don't feel like you've "gotten it all", it really doesn't matter. Just like a transmission dump/fill. Do it twice if you're that concerned.
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2013 ML550 US spec. Air+Offroad pkg
I understand why he wants to flush it out completely. Using your logic, however, a tranny flush/fill at the dealer drains 5 of the 9 liters out (ML550) and replaces, so they only do a little over 1/2 (dealer doesn't drain the torque converter...takes too long to pull off the extra drain plug I guess) leaving a lot of spent fluid in the system. Doing it yourself, and ensuring it is completely drained, gets 8.5 liters out (there is a little left in one of the cooling lines with a heat valve you can't get out). I prefer the complete flush coolant procedure with clean distilled water before a refill (which during COVID I did a my MB, a Porsche, Superduty truck, and a Honda) and those clear water flushes got a lot of crap out before the final refill on each of these well maintained vehicles.
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From: unbegrenzt
2017 GLE350 4MATIC
I understand why he wants to flush it out completely. Using your logic, however, a tranny flush/fill at the dealer drains 5 of the 9 liters out (ML550) and replaces, so they only do a little over 1/2 (dealer doesn't drain the torque converter...takes too long to pull off the extra drain plug I guess) leaving a lot of spent fluid in the system. Doing it yourself, and ensuring it is completely drained, gets 8.5 liters out (there is a little left in one of the cooling lines with a heat valve you can't get out). I prefer the complete flush coolant procedure with clean distilled water before a refill (which during COVID I did a my MB, a Porsche, Superduty truck, and a Honda) and those clear water flushes got a lot of crap out before the final refill on each of these well maintained vehicles.
The drain plugs for the transmission are 1 or 2. 1 is the main drain plug for the transmission proper. The second, if present, is the torque converter. Not all torque converters have drain plugs. WIS prescribes removing the torque converter drain plug. There are no other drain plugs for the transmission.
Draining the transmission fluid lines which run forward to the transmission oil cooler, which is integral with the radiator, is not prescribed in WIS.
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2015 Mercedes-Benz ML 350
Thanks everyone to discuss this with me. What if I I buy a coolant test, at least I can approx. to see roughly what the % of coolant vs water? Guess with this, just need try earlier when I pure BM coolant in half point.
Frank
Frank
Out Of Control!!
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From: unbegrenzt
2017 GLE350 4MATIC
Here it is: drain, then refill.
operatingfluids.mercedes-benz.com gives the fluid spec, or you can search this site. This site and Youtube has photos, written steps, and possibly WIS instructions for the procedure. You have everything you need, correct?
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From: ALLENTOWN PA
2017 AMG GT, 2015 ML350, 2013 C300
This thread made me decide to replace the coolant in my 8 year old ML350 with 60,000 miles.
Drained out all the coolant from the bottom of the radiator.
2 things a realized here:
1. drain and fill did not replace the coolant going through the heater core and hoses.
2. you would have to squeeze the upper radiator hose to burp the air trapped in the system.
Drained out all the coolant from the bottom of the radiator.
- Added a gallon of water to drain more coolant out.
- Added a gallon of purple coolant until the water that was draining out turned to purple.
- Fill the reservoir.
2 things a realized here:
1. drain and fill did not replace the coolant going through the heater core and hoses.
2. you would have to squeeze the upper radiator hose to burp the air trapped in the system.
Thread Starter
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2015 Mercedes-Benz ML 350
Today I start try do a drain and fill, but unfortunately, The radiator drain petcock only can turn 90 degree counter clockwise , did try use wrench, scare to use force, afraid to break it.
Anyone has suggestion?
Thanks
Frank
Anyone has suggestion?
Thanks
Frank
Member
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2013 ML550 US spec. Air+Offroad pkg
If I recall correctly, it only turns 90deg, you have to pull it out a little manually while turning counter-clockwise. To put back in, you have to press it in while turning 90degrees clockwise.
